<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script type="text/javascript">
    var a=10;
    alert(a);

    var b=20;
    alert(b);

    var c=30;
    alert(c);

    var d=40;
    alert(d);

    var e=50;
    alert(e);

    var f=60;
    alert(f);

    var g=70;
    alert(g);
</script>
</body>
</html>